package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();
        if (!RegexUtils.isPhoneInvalid(phone)) {
            log.info("手机号格式错误");
            return Result.fail("手机号格式错误");
        }

        String code = (String) stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String formCode = loginForm.getCode();
        if (code == null || !code.equals(formCode)) {
            log.info("验证码错误");
            return Result.fail("验证码错误");
        }
        User user = this.query().eq("phone", phone).one();
        if (user == null) {
            log.info("创建用户");
            user = createUserWithPhone(phone);
        }
        // 生成token，作为key
        String token = UUID.randomUUID().toString();
//        UserDTO userDTO = new UserDTO();
//
//        Map<String, Object> map = BeanUtil.beanToMap(userDTO);
//        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY + token, map);
//        stringRedisTemplate.expire(LOGIN_USER_KEY + token, LOGIN_USER_TTL, TimeUnit.SECONDS);
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));
        // 7.3.存储
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey, userMap);
        // 7.4.设置token有效期
        stringRedisTemplate.expire(tokenKey, LOGIN_USER_TTL, TimeUnit.MINUTES);

        log.info("登录成功,token:{}", token);
        return Result.ok(token);
    }

    @Override
    public Result sendCode(String phone, HttpSession session) {
        if (!RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号码格式错误");
        }
        String code = RandomUtil.randomNumbers(6);
        // 利用redis存储code
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code);
//        session.setAttribute("code",code);
        log.debug("发送短信验证码成功：{}", code);
        return Result.ok();
    }

    private User createUserWithPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
